Paraskevas George, Papaziogas Basilios, Gigis John, Mylonas Argirios, Gigis Panagiotis
Department of Anatomy, Faculty of Medicine, Aristotle University of Thessaloniki, Greece.
Folia Morphol (Warsz). 2004 Nov;63(4):515-8.
The persistent sciatic artery (PSA) is a rare anatomical variant where the internal iliac artery and the axial artery of the embryo provide the major supply of the lower limb, the superficial femoral artery being usually poorly developed or absent. We describe an extremely large right PSA in a 79-year-old male cadaver during a medical gross anatomy course, with simultaneous existence of a hypoplastic superficial and deep femoral artery. The PSA, which was a continuation of the anterior division of the right internal iliac artery, entered the buttock through the greater sciatic foramen situated in the gluteal region laterally to the sciatic nerve and in the mid thigh medially to the same nerve, becoming in the popliteal fossa the popliteal artery. Neither the superficial nor the deep femoral artery had communication with the popliteal artery. Because the PSA in our study was the only blood supply to the lower limb, we present the embryologic origins and the clinical anatomy of this artery.
持续性坐骨动脉（PSA）是一种罕见的解剖变异，其中髂内动脉和胚胎的轴动脉为下肢提供主要血供，股浅动脉通常发育不良或缺失。我们在一次医学大体解剖课程中描述了一名79岁男性尸体中一条极其粗大的右侧PSA，同时存在发育不全的股浅动脉和股深动脉。该PSA是右侧髂内动脉前支的延续，通过位于臀区坐骨神经外侧的坐骨大孔进入臀部，并在大腿中部坐骨神经内侧下行，在腘窝处成为腘动脉。股浅动脉和股深动脉均未与腘动脉相通。由于我们研究中的PSA是下肢的唯一血供，因此我们介绍了该动脉的胚胎起源和临床解剖。
